论文标题
VLBA在候选人黑洞X射线二进制AT2019WEY中发现了已解决的来源
VLBA discovery of a resolved source in the candidate black hole X-ray binary AT2019wey
论文作者
论文摘要
AT2019wey is a Galactic low mass X-ray binary with a candidate black hole accretor first discovered as an optical transient by ATLAS in December 2019. It was then associated with an X-ray source discovered by SRG in March 2020. After observing a brightening in X-rays in August 2020, VLA observations of the source revealed an optically thin spectrum that subsequently shifted to optically thick, as the source continued to brighten在广播中。这是通过VLBA对来源的观察。我们发现了一个解决的来源，我们解释为稳定的紧凑型射流，这是与硬X射线光谱状态下黑洞X射线二元系统相关的功能。喷射功率与积聚盘X射线光度相当。在这里，我们总结了这些观察结果的结果。
AT2019wey is a Galactic low mass X-ray binary with a candidate black hole accretor first discovered as an optical transient by ATLAS in December 2019. It was then associated with an X-ray source discovered by SRG in March 2020. After observing a brightening in X-rays in August 2020, VLA observations of the source revealed an optically thin spectrum that subsequently shifted to optically thick, as the source continued to brighten in radio. This motivated observations of the source with the VLBA. We found a resolved source that we interpret to be a steady compact jet, a feature associated with black hole X-ray binary systems in the hard X-ray spectral state. The jet power is comparable to the accretion-disk X-ray luminosity. Here, we summarize the results from these observations.
